Steam-boiler and other furnaces



0.1).f0Rv1s. Steam-Boiler andother Furnaces.

Patented Janv. 6,1880.

i'torn sys N.PETERS, PHOTO-IJTHOGRAPHER, WASHINGTON' D CA UNITED STATESPATENT OFFICE.

ORLAND D. ORVIS, OF CHICAGO, ILLINOIS.

STEAM-BOILER AND OTHER FURNACES.

SPECIFICATION forming part of Letters Patent No. 223,238, dated January6, 1880.

Application filed August 30, 1879.

To all whom it' may concern Be it known that I, ORLAND D. ORVIS, ofChicago, in the county ot' Cook and State of Illinois, have invented anew and useful Improvement in Steam-Boiler and other Furnaces, of whichthe following is a specification.

This invention relates to devices for supplying steam and air to thefire-chamber of furnaces to assist combustion.

The object of this invention is to consume the products of combustion,which would otherwise produce smoke and pass offinto the open air, bydirecting into a furnace jets of oXygen or air intermingled with thehydrogen of steam, together with streams of air alone, in such a mannerthat all of the products of combustion arising from the burning fuelwill be fully and thoroughly ignited, and hence consumed. Y

A further object is to provide a furnacedoor with means for introducingstreams of airinto the furnace at any desired angle to the surface ofthe burning fuel, or entirely cut oft' the same from the furnace.

In the accompanying drawings, in which similar letters of referenceindicate like parts, Figure l is a perspective View of a furnace andboiler, showing my attachment; Fig. 2, avertical section through thesame, showing the construction andinanner of attachment of theair-draft. Fig. 3 is a vertical section through the same and the steamand air supply pipe and steam-jet; Figs. 4 and 5, modications of theinlet ofthe supply-pipe; Fig. 6, a plan View with the boiler removed,showing the direction of the steam and air jets 5 Fig. 7, a longitudinalvertical-section, showing the relative position of the steam and airjets to the top of the bridge-wall.

A represents thefront and a part of the side walls of a furnace with aboiler mounted thereon.

B B are the doors of the ashpit, and C C the doors of the furnace, ofthe. ordinary construction.

Dis a steam-pipe connecting with a pipe having a stop-cock to the upperpart of the boiler, and extending across the front of the wall of thefurnace, with vertical extensions d d d reaching downwardly, and havingattached, at right angles to their lower ends, by any suitable means,injectors c, which form continuations of extensions d.

C are outlet-pipes to conduct combined steam and air to a furnace. Theseoutlet-pipes C are set in the walls ofthe furnace, on either side ofthefurnace-doors, in ahorizout-al plane at a height just above the surfaceot' the fuel upon the grate-bars, and not so high that a line drawn fromthem would be above the tirewall. Those next the side walls have asut'tcient horizontal curve in the direction ot' the center of thefurnace, as shown in Fig. 6, to direct the steam and air jets toward thecenter of length of the bridge-wall, where the products of combustionare the thickest and at their highest tempera-ture. The ends of thesepipes C project upon' the outside suciently beyond the walls to permitof the attachment ot' an elbow, E.

To the lower end of the elbow is attached, in a vertical line, auair-supply pipe, F, of about the same length as the outlet-pipe, whichmay.

be straight, as shown in Figs. l and 3,'or fiaring at its mouth, asshown in Fig. et.

A modification of the air-supply Apipe is shown in Fig. 5, in which Iuse a T-joint instead of an elbow, and extend the pipe above theoutlet-pipe, so that I am enabled to obtain a current of air from twodirections.

The steam-pipcs are connected to the air and outlet pipes by passing theinjector, in a horizontal plane with the outlet-pipe, through aperforation in the elbow or T-joint, as shown in Figs. l, 3, 4, and 5.`By this means I am enabled to conduct a jet of steam and air in adirect line into the furnace, and to have the jet at such a distancefrom the opening of the air-supply pipe that there will be little or nonoise from the rush of the steam and air, and at the same time have adirect current of air in the supply-pipe. In the doors C of the furnaceI have a rectangular ope'nin g for inserting the drafts G, which, whenclosed, entirely ll the opening. These drafts have perforations gextended through them from edge to edge, and are pivoted to the doors,so that when closed no air will be admitted. The perforations g'are madequite large at their upper end, but converge toward the center andterminate in a small neck, and are in outline like the bowl and stem ofan ordinary IOO goblet. To the neck of this perforation is attached aremovable extension, g', in such a manner that it will not interferewith the opening,` and closing of the draft.

By the above construction it will be seen that 1 may not only cut offthe current of air through the draft, but may direct it at any desiredangle into the furnace, or upon the fuel, and that a supply of air isthus obtained between the currents of air and steam tocompletecombustion, thereby consuming the smoke, and at the same timeeconomizing the amount of steam otherwise necessary for this purpose. A

The operation of my device is as follows, viz.: Having iired up untilsteam has formed in the boiler, I turn the stop-cock and admit the steamto the pipes. As a vacuum is formed by the escape of the steam from theinjector through the inlet-pipe into the furnace the air rushes in fromthe suppl y-pipc, and is commingled with the steam, thus producing ablast of oxyhydrogen, to assist combustion in the furnace.

About the time the seam is turned on I open the air-drafts in the doors,to introduce a current of air between the streams of air and steam. Bypractical experiment I have found that some of the products ofcombustion accumulate between the streams of oxyhydrogen, and that byhaving` the intermediate adjustable air-draft, to introduce a current ofair between these streams, they are entirely consumed.

Having,` thus described my invention, I wish it to be understood that Ido not confine myself to the exact construction set forth, for I mayinsert the piped through the elbow, instead of attaching` it upon theoutside to the injector, or I may make my draft with straightperforations instead of converging ones, and I may do away with theextension g', 85e.; but

VVha-t I do claim, and desire to secure by Letters Patent, is-

1. In a furnace, a serie-s of steam and air pipes, arrangedsubstantially as described, to inject combined steam and air in ahorizontal plane from the front, so as to converge toward the center andback of the furnace, below the fire-wall, and in close proximity to theburning` fuel, in combination with the pivotally-adj ustablean d indepen dently-operatin g air-draft secured toA the door of the furnaceand intermediate the points of entrance of the jets, the said draftbeing an auxiliary to the combined steam and air jets, wherebycombustion is facilitated and the smoke entirely consumed.

2. The combination, with a furnace-door, of a pivotallyadjustableair-draft attached to said door, and provided with perforations g,converging near their bot-tom, as shown, and removable extensions g',substantially as and for the purpose described.

3. The combination, with the door of a furnace, ofthepivotally-adjustable air-drafts G, attached to said door, and providedwith perforations g, extending from edge to edge, whereby a current ofair may be directed into the furnace at any desired angle .orbe entirelycut off, substantially as described and shown.

(IRLAND D. ORVIS. litnesses:

Giras. H. Serrorr, J os. P. WRITING.

